Executive Summary

Title Sudo vulnerability
Name USN-4154-1 First vendor Publication 2019-10-14
Vendor Ubuntu Last vendor Modification 2019-10-14
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 8.8
Base Score 8.8 Environmental Score 8.8
impact SubScore 5.9 Temporal Score 8.8
Exploitabality Sub Score 2.8
Attack Vector Network Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:C/I:C/A:C)
Cvss Base Score 9 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores


A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM


Sudo could be made to run commands as root if it called with a specially crafted user ID.

Software Description: - sudo: Provide limited super user privileges to specific users


Joe Vennix discovered that Sudo incorrectly handled certain user IDs. An attacker could potentially exploit this to execute arbitrary commands as the root user.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.04:
sudo 1.8.27-1ubuntu1.1
sudo-ldap 1.8.27-1ubuntu1.1

Ubuntu 18.04 LTS:
sudo 1.8.21p2-3ubuntu1.1
sudo-ldap 1.8.21p2-3ubuntu1.1

Ubuntu 16.04 LTS:
sudo 1.8.16-0ubuntu1.8
sudo-ldap 1.8.16-0ubuntu1.8

Ubuntu 14.04 ESM:
sudo 1.8.9p5-1ubuntu1.5+esm2
sudo-ldap 1.8.9p5-1ubuntu1.5+esm2

Ubuntu 12.04 ESM:
sudo 1.8.3p1-1ubuntu3.8
sudo-ldap 1.8.3p1-1ubuntu3.8

In general, a standard system update will make all the necessary changes.


Package Information:

Original Source

Url : http://www.ubuntu.com/usn/USN-4154-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-755 Improper Handling of Exceptional Conditions

CPE : Common Platform Enumeration

Application 1
Application 68
Os 5
Os 3
Os 2
Os 2

Alert History

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Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2019-10-14 21:19:26
  • First insertion